Basically, you can create a new array by passing a function to the components of another array (leaving that original one intact). Some basic syntax to get started with, you can use whatever you want for the variable name, but to get the string literal to work there should be a ${variable} with no indexes inside the literal.

arr.map(variable=>{function here});

Let me know if you have still having trouble, it took me some time to figure out after reading other posts